Title:
DEPRESSION/ELEVATION ANGLE CALCULATION DEVICE AND DEPRESSION/ELEVATION ANGLE CALCULATION METHOD
Document Type and Number:
Japanese Patent JP2018141643
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a depression/elevation angle calculation device and a depression/elevation angle calculation method which reduce influence due to an underwater measurement situation and position relationship between one's own ship and a target in target searching and calculate an optimal depression/elevation angle as a finding direction of a sound wave emitted from the searching target.SOLUTION: A depression/elevation angle calculation device comprises: an input unit in which environmental information showing a surrounding environmental condition, one's own ship information including depth information of one's own ship, and a target depth are input; a sound ray computation unit which calculates a sound ray showing a depression/elevation angle of a sound wave predicted to arrive at a ship on the basis of the environmental information and the one's own ship information; a phasing depression/elevation angle calculation unit which extracts a direct wave sound ray, a sea surface reflected wave sound ray, and a sea bottom reflected wave sound ray from the calculated sound ray and calculates a distance from the ship to an intersection of each of the extracted sound rays with the target depth and the depression/elevation angle of each of the sound rays relative to the one's own ship; and a display unit which associatively displays the distance and the depression/elevation angle all together for the extracted sound rays.SELECTED DRAWING: Figure 1
Inventors:
KAMIMURA KEI
Application Number:
JP2017034326A
Publication Date:
September 13, 2018
Filing Date:
February 27, 2017
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD
International Classes:
G01S3/801; B63B49/00; B63G7/08; B63G8/39; F41G3/00; G01S3/808; G01S5/20
Foreign References:
| US20090067290A1 | 2009-03-12 |
Attorney, Agent or Firm:
Patent Business Corporation Kisa Patent Trademark Office